Calling Luke Perry: Though her hirsute on-screen brother Jason Priestly will only be making a behind-the-camera trip to 90210 later this season, Shannen Doherty has finally inked to reprise Brenda Walsh for additional episodes past the four she's already completed. Says Extra , "She'll do another two episodes of the CW hit, with a possibility of more to follow." So that's where the craft services budget is going! [Extra ]